jones



(No Model.) 3 Sheets-Sheet 1.

P. W. JONES.

TELEGRAPH CIRCUIT.

No. 441,847. Patented Dec. 2, 1890.

Jifaz'nline q/viiineooeo (No Model.) 3 Sheets-Sheet 2.

P. W. JONES.

TELEGRAPH 011101111.

No. 441,847. Patented Dec. 2, 1890.

51 1 uewto'o UNITED STATES PATENT OFFICE:

FRANCIS JONES, OF NEIV YORK, N. Y.

TELEGRAPH-CIRCUIT.

SPECIFICATION forming part of Letters Patent No. 441,847, dated December 2, 1890. Application filed June 24, 1890. Serial No. 356,581- (N0 model.)

To all whom it may concern.-

Be it known that I, FRANCIS W. J ONES, a citizen of the United States, and a resident of New York city,in the county and State of New York, have invented a new and useful Improvement in Telegraph-Circuits, of which the following is a specification.

My invention relates to apparatus designed for use in a main telegraph-office Where local circuits and branch-office wires are supplied with their working electric currents from dynamomachines, storage-batteries, or other similar sources. In a main telegraph-office it is very desirable to make a speedy connection between the sending and receiving apparatus of a quadruplex or duplex system situated in said main office and the sending and receiving apparatus in a branch office, so that the operators in the branch office may be able to send signals through and receive signals from such quadruplex or duplex circuit with as great facility as if situated directly in the main office.

My invention relates also to the method of connecting apparatus and wires to each other to admit of any easy and rapid connection of a single Morse circuit with a quadruplex or duplex circuit, so that messages may be automatically repeated from the duplex circuit to the single circuit, and vice versa, insuch a way that the operator on the Morse wire may be able to either send to or receive from the distant office on the duplex circuit without the assistance of an operator at the office where the repeaters are situated.

My invention still further relates to a new and useful organization of wires and appara tus by which the local circuits and apparatus of one duplex system maybe readily connected with the local circuits and apparatus of another duplex system in such a manner as to permit an automatic transmission of messages from one system to the other simultaneously. I

My invention also further embraces a new and useful arrangement of telegraph apparatus and wires in connection with dynamo-machines or any similar source of electric currents, rendering the operation of said apparatus, wires, and machines reliable, free from.

overheating, and easily and quickly adjusted to obtain the best results.

In the accompanying drawings, Figure 1 is a diagram of apparatus, circuits, and wires forming the general features of my invention. Figs. 2 and 3 are diagrams more fully illus trating the same, like letters and figures indicating like parts.

In Fig. 1, J J J J indicate the movable jaws of four spring-jacks, and b I) I1 I) the opposite contact-plates on which the jacks bear.

D is a dynamo-machine or other similar source of electric energy, connected at one pole to earth and the other pole connected through resistances Roz Rm Rx with the various local circuits of two distinct duplex systems to be operated in or near one main office.

A and B indicate, respectively, the two sets of duplex telegraph apparatus, or one duplex set and one side of a quadruplex set, located in the repeating or main oifice. Each set A and B is shown in its normal condition ready for operation. The local circuits of set A are established as follows: The receiving-circuit from earth nia. dynamo D, resistance R00, points 1 and 2 of the three-point switch Sw', local points at and 5 of relay Ry, sounder S, contact-plate I), and spring-jack J ,resistauce Re to earth. The sending-circuit of set A connects from earth rice D R50 points 1 and 2 of three-point switch S10 transmitter T, key K, contact-plate b springjack J resistance R62 to earth. The local circuits of set 13 are established correspondingly to those of A. From points 3 3, 850., of three-point switches S20 S10 S20 Sw flexible conducting-cords are connected with wedges \V, &c., each wedge having one side insulated and the other side a conductor, in a well-known way.

0 represents the receiving and sending apparatus at a branch oliice, the circuits from which are as follows: The receiving-circuit from earth a (Ca sounder S, thence bybranch or leg wire X to the main office through rheostat R11 to the live or conducting side of wedge BlV. The sending-circuit of said branch office starts from earth one key K, sounder S branch or lcgwire X to the main office A. A. v l ,I

through rheostat Rh to the live or conducting side of wedge BW Resistances Re Re Re Re, which may be adjustable or otherwise, are permanently connected with the movable part of the Epring-jacks and the earth, as shown.

Assuming the dynamo D to have a potential of thirty volts and the local circuit ma R, 1), and J a resistance of one hundred and fifty ohmscomposed as follows: Rm, thirty ohms; S, twenty ohms; Re and the other parts of the circuit, one hundred ohms; total, one hundred and fifty ohmsthen the electromagnet S will be energized by a currentof two hundred millamperes when Ry is closed at point 5, and similarly in respect to the other circuits m'a R0; R00 R00 Should BVV be inserted between J and the plate I), the movable part of J and the resistance Re will be thrown out of circuit by the insulated side of BVV and a new circuit will be established ma 1), the conducting side of BlV,rheostat Rh, and wire as through branch-office apparatus C to earth. It is obvious that if the resist;- ance of Rh, wire cc, and sounder S is additively equal to resistance Re, then the current flowing from the dynamos ttCL Rat, S, and BlV to branch otfice 0 will be equal to two hundred millampres, and the electromaguets now in circuit will be energized by the same strength of current as was S of, the main office prior to the insertion of BVV, and similarly of all the other local circuits shown.

In case it is required to connect the local circuits of set A with those of set B to form an automatic repeater it is only necessary to turn the three-point switches Sw and S212 Figs. 1 and 2, of set A to the right, connecting the points 2 and 3, and then inserting wedge \V in spring-jack J and W in J when a proper arrangement of circuits will be established, as follows: A circuit will be formed from earth via, the dynamo D, R00 S10 T, key K contact-plateh wedge V, via flexible cord to S20, points 3 and 1, thence via, points 4: and of Ry, sounderS,contact-plate h J, and resistance Re to earth, as shown in Fig. 1. In Fig. 2 the circuit above described is continued through wedge 1310 of flexible cord Rh and ac to branch office and earth, instead of ma Re and earth, when BW' is not inserted, A similar circuit to that above described will be established via R03 Sufi, Ry S b and W of set E, connecting with set A m'a flexible cord and S as will be readily understood by inspection of the drawings. The resistance of these circuits as connected per Fig. 2 will be somewhat greater than that previously assumed for various parts of the circuits, and the working-current will be less than before the insertion of V and W yet not sufficiently so as to render the electro-magnets inoperative.

Fig. 2 more clearly shows the connections described for the operation of sets A and B to automatically repeat into each others mainline circuits through the mutual control of their local circuits, and the extension of their local circuits to earth at branch office C is shown on the left-hand side. The dynamocircuits m'a R00 and R90 are shown open at Sw and S10 and the resistances Re Re Re Re are removed from their normal circuits by the insulated portion of the wedges.

Fig. 3 exhibits the apparatus and the necessary local connections for placing a single Morse circuit in connection with a duplexed circuit, or with one side of a quadruplexed circuit, at a repeater-station, whereby the distant operator of the duplexed or quadruplexed circuiton one side of the repeater-station may be able to transmit and receive messages to or from any station on the single Morse circuit on the other side of the repeater-station. During the time of such connection of the single with the multiple circuit, but one transmission of signals is possible either from the single circuit to the multiple circuit, or vice versa.

The single Morse circuit M L at M is shown in the drawings connected locally with a duplex set of apparatus at A in such a manner as to be capable of receiving signals from the duplex relay Ry and of transmitting signals we the transmitter T of the duplex set with out interference of one with the other in a well-known way. It is to be understood that the distant operator on the duplex circuit should keep his key closed when desiring to receive signals from a Morse station on the single circuit in order that relay Ry at A, Fig. 3, will remain in aclosed position to hold transmitter F closed to preserve the continuity of main line M L, as will be seen.

The main and local circuits of one-half of a Toye repeater are shown at M. The Morse main-line circuit is completed from earth vie dynamo D, key K relay R transmittingspring of T to the main-line wire M L and distant station. When T is in a closed position, the current from D is at liberty to charge the main Wire; but when T is open, as shown in M, the current from D seeks earth m resistance E R on the lever of T holding relay Ry closed in a well-known manner. The half-repeater, or, as it is generally termed, the monkey, is shown connected to a duplex set at A in proper condition to repeat into each other. The receiving-sounder S of the single-line repeater M is connected in local circuit from earth through the lever and front stop of relay Ry three-point switch S, thence we point 3, resistance Rh, wedge contact-plate 12 key K, transmitter T Sw- Rac and via dynamo D to earth. The sending-key K and transmitter T are connected in local circuit from earth at three-point switch S10 point 3, resistance Rh wedge V plate I), sounder S, relay-point, and lever of relay Ry Sw R00 to dynamo and earth. The resistances Rh and Rh are to be made nearly equal to the IIO resistances lie and R62, respectively, so that when and are inserted, as shown in A, the currents from D will meet with approximately the same resistance via Rh and R11 as is the case when the wedges and W are not inserted in J J and the currents go to earth Tia Re and'Re' To restore the sets A and M to their normal or non-repeating condition it is necessary to remove and VV from J and J and turn the three-point switches Sic and Sw to connect with their points 1 1 on the right. The local circuits of the single-line repeater M will then be supplied by currents from dynamo D via resistances Rx Rm, as will be readily seen.

I do not limit myself to applying my invention to the particular telegraph apparatus I have described, since it is obvious that the same results may be attained with other apparatus.

hat I claim as my invention is 1. In a local circuit of a multiplex telegraph system, the combination of a spring-jack J, whose movable jaw is connected to earth through an equalizing resistance, a wire including the eleetro-magnet of a sounder, said wire connecting point I) of the spring-jack with one point of the local contacts of relay Ry, a wire from the other point of the local contacts of relay Ry to a threepoint switch Sw', which is adapted to complete the local receiving-circuit ria points 2 and 1, resistance Rae, and the source of electric current D to the earth, or to disconnect D at point 1 and to connect the local wire from the relay to point 3 and via a flexible cord to the wedge \V', as and for the purpose described.

2. In a local circuit of asystem of multiple telegraph, the combination of a spring-jack J whose movable jaw is connected to earth through an equalizing resistance, a wire including a key K, the electro-magnet of transmitter T, connecting point 17 of said springjack to point 2 of three-point switch S10 which is adapted to complete the local transmitting-circuit eithervia points 2 and 1, equalizing resistance R00 and source of electric current D to the earth, or to disconnect D at point 1 and to connect the local wire from the transmitter to point 8 and hid a flexible cord to the wedge W as and for the purpose described.

3. In a main or repeating telegraph station, the combination, with a system of multiplex receiving and sending local circuits, of a source of electric current D, equalizing resistances Rx R0c ,three-point switches Sw S20 which are adapted to connect said local circuits either with the source of electric current D or with the wedges W and or their equivalents, which maybe inserted in or connected with spring-jacks J 3 and J, respectively forming part of the sending and receivinglocal circuits of another multiplex system, as and for the purpose described.

4. In the main or repeating telegraph station operating multiplex circuits, the combination of the local receiving and sending cir cuits of a set of: multiple telegraph having a source of electric current I) that may be disconnected from said circuits by switches S10 and S20 spring-jacks J and J respectively connected through equalizingresistances Re and R62 to earth, normally forming part of said circuit-wedges \V and W which may be connected to said circuits by switches Sw and S20 with similarly-arranged local sending and receiving circuits of another set of multiplex telegraph by the insertion of said wedges V and 3V in spring jacks J 3 and J, whereby the main-line signals of the relay of one set may, through its local points, operate the transmitter of the other set, as and for the purpose described.

5. In a main or repeating telegraph station, the combination of the receiving and sending local circuits of a set of multiple telegraph having a source of electric current D, springjacks J and J equalizing resistances Re and Re permanently connected between the movable jaws of said spring-jacks and the earth, normally forming part of said circuits, wedges- Bw' and E10 which insulate the earth and'resistances Re and R62 from said local circuits, and at the same time connect therewith at points 0 and (J the branch wires X and X the distant ends of which are connected to earth and include, respectively, equalizing resistances Rh and Rh and the usual receiving-sounder S, and key K and sounder S, as and for the purpose described.

6. I11 a main or repeating telegraph station, the combination of the receiving and sending local circuits of a set of multiplex telegraph having a source of electric current D, springjacks J and J equalizing resistances Re and R82, permanently connected between the movable jaws of said spring-jacks and the earth, normally forming part of said circuits, and the local circuits of a single-line repeater, which includes in its sending-circuit key K, electro-magnet of transmitter T switch Su which is adapted to connect said sending-circuit either with wedge W having one conducting and one insulating side, or with a source of electric current D, equalizing resistance R71 and which includes in its receiving-circuit the local points of relay R31 sounder S switch Sir, which is adapted to connect said receiving-circuit with wedge 6, having one conducting and one insulating side, or with a source of electric current D, equalizing resistance Rh", so arranged that by the insertion of wedges and \V in or on spring-jacks J and J respectively, the insulating sides of the wedges will disconnect the movable jaws of spring-jacks J and J and the conducting side-of said wedges will respectively connect the receiving local circuit of relay Ry with the sounding local circuit of the single main,line repeatervia point C, resistance R71 switch 810", electro-magnet of T and key K" to earth, and the sending IIS local circuit of transmitter T with the rcceivmy invention I have signed my name, in presing local circuit of the single main-line reence of two Witnesses, this 26th day of May, peater ma point 0 resistance Rh, points 3 1890.

and 2 of switch Sui, sounder S and local FRANCIS V. JONES. 5,pointsr of relay Ry to earth, as and for the Witnesses:

purpose described. GEO. WV. BREGK,

In testimony that I claim the foregoing as C. E. ASHLEY. 

